Tsukuyomi: Moon Phase Special
月詠 -MOON PHASE- おにいさま, ゆらゆらきらきらどんぶらこ これって, なーんだ?
66%SPECIALfinished2006
月詠 -MOON PHASE- おにいさま, ゆらゆらきらきらどんぶらこ これって, なーんだ?
Omake Special from the final DVD volume. The Special storyline has very little to do with the original series outside of having some of the same characters, and has a completely different storyline which does not fit into anything which came before it. (Source: AniDB)